#include <iostream>
#include <fstream>

using namespace std;

void write() {
    ofstream ofs("data.txt"); // RAII 패턴을 적용하고 있어 리소스 해제가 스택을 통해 이루어짐
    ofs << 0.0 << ' ' << -0.4 << '\n';
    ofs << -0.5 << ' ' << 0.2 << '\n';
    ofs << 0.5 << ' ' << 0.8 << flush;
}

void read() {
    ifstream ifs2("data.txt");
    float val2;
    cout << boolalpha;
    while (ifs2 >> val2) {
        cout << val2 << endl;
        cout << ifs2.fail() << ' ' << ifs2.eof() << endl;
    }
    cout << ifs2.fail() << ' ' << ifs2.eof() << endl;
}

int main() {
    write();
    read();
    return 0;
}